ULTRA-SHORT-WAVE TRANSMISSION PHENOMENA 



371 



Bright and Long Branch. Between these two regions the narrow 

 sand strip is almost entirely occupied by breakwater, railroad, and 

 highway with a number of pole-carried transmission lines. Sandy 

 Hook has several splendid locations, but housing and 60-cycle power 

 would have had to be supplied, and we elected, therefore, to transmit 

 from the Calef estate in North Sea Bright. This house, the last one 

 along the beach north of Long Branch, was within 50 feet of the ocean 

 and already had electric power connections. 



Fig. 1 — Map showing transmitter location. Airplane flights were made along 

 the south shore of Long Island. 



Experimental 

 Our experimental setup was as follows: In the Bell Laboratories' 

 tri-motor Ford plane, placed at our disposal by Mr. F. M. Ryan and 

 his staff, two receivers operating at L58 and 4.6 meters respectively, 

 and equipped with manual recorders as described in the earlier cited 

 paper, were installed. The insulated mast antenna support in the 

 tail of the plane was used as the 4.6 meter receiving antenna and con- 

 nected as an approximately }/2 wave, end tapped, conductor. The 

 L58 meter antenna was a tubular half wave antenna, cut in the 

 center and connected to an internal two-wire transmission line. It 

 was unbalanced but apparently not seriously so. Its mounting socket 

 was up forward between the wings. These receivers were double 



